Electronics I - Introduc0on - Gonzaga...
Transcript of Electronics I - Introduc0on - Gonzaga...
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ElectronicsI-Introduc0on
Chapter1
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Electronicsvs.Microelectronics• DiscreteCircuitsvs.IntegratedCircuits
• Limitthecomponentcounttoachieveasmallboardarea
• Availableresistorsareintherange1Ω-10MΩ
• Availablecapacitorsareinrange1pF-10mF
• Allresistorsarewithin1-10%oftheirnominalvalue
• Theu0lityofdiscretetransistorsislimited.Usuallypreferopampsoverdiscretetransistors.Some0meuseBJTsifopampscan’tdothejob.UseMOSFETprimarilyasswitches
• Avoidusingresistorsandinductors,useasmanyMOSFETtransistorsasneededtorealizethebestcircuitimplementa0on
• Availablecapacitorsareinrange1fF-100pF
• Thecri0calparametersintransistorscanbemadetomatchwithin1%,butvarybymorethan30%fordifferentfabrica0onruns
• Capacitorsofsimilarsizecanmatchtowithin0.1%,butvarybymorethan10%fordifferentfabrica0onruns
Source:B.Murmann,Stanford
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CircuitsareEverywhere
[email protected] 3Source:B.Murmann,Stanford
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Inthebeginningwas…
[email protected] 4Source:B.Murmann,Stanford
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Moore’sLaw
In1965,GordonMoore’spredictedexponen0algrowthinthenumberoftransistorperintegratedcircuits
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…andthepredic0onwasright
[email protected] 6• Noothertechnologyhasgrownsofastsolong
Transistorshavebecome:• smaller• faster• consumelesspower• cheaperto
manufacture
source:wikipedia
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TransistorsCost
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Everybodycanaffordalotoftransistors
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SocialImpact
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Applica0onsdrivingthemarket
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IoTTrend:moreconnectedthingsthanpeople
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StateoftheArtSemiconductorFab
Source:B.Murmann,Stanford
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45nmCMOSTechnology(Intel)
source:SteveCowdenTheOregonianJuly2007
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StateoftheArtMicroprocessor
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HearingAidwithWirelessReceiver
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AnalogandDigitalSignals
• Analog=signalsthatoccursinnaturearecon0nuousin0meandcon0nuousinamplitude
• Digital(abstrac0on)=signalcantakeonlyafinitenumberofvaluesandcanchangesonlyatfixedpointsin0me
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AnalogandDigitalSignals
Thedigitalsignal(red)isthesampledandroundedrepresenta0onofthegreyanalogsignal
S/H QAnalogWorld
DigitalWorld
Source:wikipedia
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Analog&vs.Digital
• AnalogCircuitsAdvantages– Requirefewerdevices– Bekertodealwithlowsignalamplitudes– Bekertodealwithhighfrequencies
• DigitalCircuitsAdvantages– Bekerimmunitytonoise– More“adaptable”(e.g.microprocessors)– Designcanbedoneatmoreabstractlevel– Bekereconomic(easiertoimplementasICs)
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MixedSignalSystem
Digital Processing
A/D
D/A
Signal Conditioning
Signal Conditioning
Analog Media and
Transducers
Sensors, Actuators, Antennas, Storage Media, ...
Mixed-Signal Integrated Circuit
Source:B.Murmann,Stanford
signalcondi0oning=signalscaling(amplifica0onorakenua0on)andshining
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ManagingComplexity:LevelsofAbstrac0on
Analog Digital
S/H QAnalogWorld
DigitalWorld
Source:B.Murmann,Stanford
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CommonAnalogBlocks
• Powersupplies• Amplifiers• Filters• Signalgenerators(oscillators)• Wave-shapingcircuits• Converters(ADCandDAC)
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Circuitdesignersmustbebroad
Source:B.Murmann,Stanford
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CourseTopics• PhysicsofSemiconductors• Diodemodelsandapplica0oncircuits• BasicsofAmplifiers• CircuitSimula0on• Transistors(BJTsandMOSTs)• BiasingofTransistors• SinglestageAmplifiers(atomsofanalogdesign)• Mul0stageAmplifiers• CurrentSourcesandMirrors• FrequencyResponseofAmplifiers• Opampbasedfeedbackcircuits
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Prerequisites• Lumpedvs.distributedcircuits• Kirchhoff’sRules• Independentanddependentsources• Superposi0onprinciple• TheveninandNortonequivalents• Cons0tu0veequa0onsofR,LandC• Sinusoidsandcomplexexponen0als• LTIsystemsandtheirproper0es• FouriertransformandLaplacetransform• Frequencyand0me-domainresponseofLTIsystems• Firstandsecondorderlinearcircuits(transientandsteady
stateresponse)